CN207007348U - A kind of wave length measuring system - Google Patents
A kind of wave length measuring system Download PDFInfo
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- CN207007348U CN207007348U CN201720398037.3U CN201720398037U CN207007348U CN 207007348 U CN207007348 U CN 207007348U CN 201720398037 U CN201720398037 U CN 201720398037U CN 207007348 U CN207007348 U CN 207007348U
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- interferoetalons
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- wavelength
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Abstract
The utility model embodiment provides a kind of wave length measuring system, including：Spectral module, double Fabry glass sieve interferoetalons module, linear filter, the first photodetector and the second photodetectors；Spectral module is used to the testing laser of input being divided into multichannel, and is separately input to linear filter, the first photodetector and double Fabry glass sieve interferoetalons modules；The laser for inciding linear filter is output to the second photodetector；The photoelectric current of first photodetector measurement and the photoelectric current of the second photodetector measurement are used to calculate transmissivity of the laser by linear filter, to measure preliminary wavelength；Double Fabry glass sieve interferoetalons modules are used to measure multiple accurate wavelength, multiple accurate wavelength and wavelength of the preliminary wavelength for determining testing laser.The utility model embodiment, it is possible to achieve the high-precision measurement optical maser wavelength in continuous frequency domain.
Description
Technical field
Laser technology field is the utility model is related to, more particularly to a kind of wave length measuring system.
Background technology
In the production link of optical communication field emitter light source, from wafer growth, cutting, the encapsulation of chip, component
Coupling, encapsulation, the assembling for arriving module again, centre have passed through the complicated process in tens of roads, and each process is required for largely
Wavelength measurement operates.If light source is tunable laser, compared to laser with fixed wavelength, the workload of wavelength measurement is even more
Exponentially increase, to find out the operating point of laser, it is necessary to which the testing time for measuring wavelength will be up to tens of thousands of or even hundreds thousand of times.
Substantial amounts of wavelength measurement demand in being produced based on emitter light source, using the spectroanalysis instrument or wavemeter of routine come
Measurement can bring huge time cost and equipment price cost.The utility model provides a kind of wave length measuring system, to solve
The certainly Cost Problems of wavelength measurement, realize it is quick, precisely, measure optical maser wavelength at low cost.
Utility model content
In view of the above problems, it is proposed that the utility model embodiment overcomes above mentioned problem or at least portion to provide one kind
A kind of wave length measuring system to solve the above problems with dividing.
In order to solve the above problems, the utility model embodiment discloses a kind of wave length measuring system, including：
Spectral module, double Fabry-Bo Luo interferoetalons modules, linear filter, the first photodetector and
Two photodetectors；
The spectral module is used to the testing laser of input being divided into multichannel, and be separately input to the linear filter,
First photodetector and double Fabry-Bo Luo interferoetalons modules；
The laser for inciding the linear filter is output to second photodetector；
The photoelectric current of the first photodetector measurement and the photoelectric current of second photodetector measurement are based on
Transmissivity of the laser by linear filter is calculated, to measure preliminary wavelength；
Double Fabry-Bo Luo interferoetalons modules are used to measure multiple accurate wavelength, the multiple accurate wavelength
With wavelength of the preliminary wavelength for determining the testing laser.
Preferably, double Fabry-Bo Luo interferoetalons modules include：First spectroscope, the second spectroscope, first
Fabry-Bo Luo interferoetalons, the second Fabry-Bo Luo interferoetalons, the 3rd photodetector, the 4th photodetection
Device, the 5th photodetector, the 6th photodetector；
The laser of double Fabry-Bo Luo interferoetalons modules is incided after first spectroscope, one
Shunt excitation light is reflected into the first Fabry-Bo Luo interferoetalons, and another part enters through first spectroscope
Second spectroscope；
The laser for inciding the first Fabry-Bo Luo interferoetalons is output to the 3rd photodetector；
Described second spectroscopical laser is incided, a part is reflected into second Fabry-glass Luo Gan and relates to mark
Quasi- tool, another part are output to the 4th photodetector through second spectroscope；
The laser of the second Fabry-Bo Luo interferoetalons is incided, a part passes through second Fabry-glass
Sieve interferoetalons enter the 5th photodetector；Another part is anti-by the second Fabry-Bo Luo interferoetalons
Penetrate, be again introduced into second spectroscope；
Described second spectroscopical laser is reflected into by the second Fabry-Bo Luo interferoetalons, a part is thoroughly
Cross second reflective mirror and enter the 6th photodetector；
The photoelectric current of the 3rd photodetector measurement and the photoelectric current of the 4th photodetector measurement are based on
Transmissivity of the laser by the first Fabry-Bo Luo interferoetalons is calculated, to determine the multiple first accurate wavelength；
The photoelectric current of the 5th photodetector measurement and the photoelectric current of the 6th photodetector measurement are based on
Transmissivity of the laser by the second Fabry-Bo Luo interferoetalons is calculated, to determine the multiple second accurate wavelength；
The multiple first accurate wavelength, the multiple second accurate wavelength, it is used for the preliminary wavelength described in determination
The wavelength of testing laser.
Preferably, the spectral module includes：1X4 optical splitters, photo-coupler, the light-splitting device of plane light wave conduction.
Preferably, the first Fabry-Bo Luo interferoetalons and the second Fabry-Bo Luo interferoetalons
The frequency cycle of transmissivity spectral line is identical.
Preferably, the first Fabry-Bo Luo interferoetalons and the second Fabry-Bo Luo interferoetalons
The frequency cycle of transmissivity spectral line, less than the frequency error range of the linear filter.
Preferably, the first Fabry-Bo Luo interferoetalons and the second Fabry-Bo Luo interferoetalons it
Between the position of maximum of points of transmissivity spectral line stagger a quarter frequency cycle.
Preferably, the spectral module, double Fabry-Bo Luo interferoetalons modules, the linear filter, institute
It is optical fibre device to state the first photodetector and second photodetector；
The spectral module is connected with the linear filter by the joints of optical fibre；
The linear filter is connected with second photodetector by the joints of optical fibre；
The spectral module is connected with first photodetector by the joints of optical fibre；
The spectral module is connected with double Fabry-Bo Luo interferoetalons modules by the joints of optical fibre.
Preferably, double Fabry-Bo Luo interferoetalons modules also include optical fiber collimator, the optical fiber collimator
Incident light for the joints of optical fibre to be exported is converted to collimated light.
The utility model embodiment includes advantages below：
In the utility model embodiment, the wavelength of measurement laser that can be substantially using linear filter.Linearly filtering
In the frequency error range of ripple device, two Fabry-Bo Luo interferoetalons in double Fabry-Bo Luo interferoetalons modules
The high-precision measurement optical maser wavelength in continuous frequency domain can be realized.
During the wave length measuring system measurement wavelength of the utility model embodiment, six photodetectors in measuring system are only needed
Photoelectricity stream information can measure wavelength, measure it is wavelength converting for measurement photoelectric current, the measurement of microsecond rank high speed can be realized
Wavelength.
The structure of whole wave length measuring system is simple, greatly reduces the cost of wavelength measurement.
Brief description of the drawings
Fig. 1 is a kind of structured flowchart of wave length measuring system embodiment of the present utility model；
Fig. 2 is for the transmissivity spectrum of linear filter in the utility model embodiment；
Fig. 3 is the schematic diagram of the transmissivity spectral line of Fabry-Bo Luo interferoetalons；
Fig. 4 is the schematic diagram of double Fabry-Bo Luo interferoetalons module measurement wavelength in the utility model embodiment.
Embodiment
To enable above-mentioned purpose of the present utility model, feature and advantage more obvious understandable, below in conjunction with the accompanying drawings and tool
Body embodiment is described in further detail to the utility model.
The measurement of optical maser wavelength, generally with spectroanalysis instrument or wavemeter both device measurings.Spectroanalysis instrument goes out
Now there is very long history so far, the technology of use is also relatively more, mainly there is prism spectrometer and grating spectrograph.Led in optic communication
Domain, the measurement of optical maser wavelength mainly use wavemeter.The measurement accuracy of wavemeter is higher.
The precision of spectroanalysis instrument measurement wavelength is poor, the wavelength accuracy of the spectroanalysis instrument of various models from 10pm to
100pm, the time of measurement were also grown, from 0.2 second to 0.5 second.Wavemeter measures optical maser wavelength, though measurement accuracy is high,
But time of measuring is also grown, from 0.25 second to 0.5 second.Spectroanalysis instrument and wavemeter equipment are all very expensive, and a platform is set
Standby price wants tens of thousands of dollars, and the cost for causing wavelength measurement is very high.
Reference picture 1, a kind of structured flowchart of wave length measuring system embodiment of the present utility model is shown, can specifically be wrapped
Include：
Spectral module 11, double Fabry-Bo Luo interferoetalons Etalon modules 12, linear filter 13, the first photoelectricity
The photodetector 15 of detector 14 and second；
The spectral module 11 is used to the testing laser of input being divided into multichannel, and is separately input to the linear filter
13rd, first photodetector 14 and double Fabry-Bo Luo interferoetalons modules 12；
In the utility model embodiment, spectral module 11 can include：1X4 optical splitters, photo-coupler, planar optical waveguide
The light-splitting device of formula；
The laser for inciding the linear filter 13 is output to second photodetector 15；
The photoelectric current and the photoelectric current of second photodetector 15 measurement that first photodetector 14 measures are used
In calculating transmissivity of the laser by linear filter 13, to measure preliminary wavelength；
Double Fabry-Bo Luo interferoetalons modules 12 are used to measure multiple accurate wavelength, the multiple Exact Wave
Long and described preliminary wavelength is used for the wavelength for determining the testing laser.
Reference picture 2 show the transmissivity spectrum of linear filter in the utility model embodiment.
The transmissivity of linear filter utilizes transmissivity in spectral line and wavelength with wavelength monotonic increase (or successively decreasing)
Corresponding relation, it can be utilized to measure wavelength.If testing laser is aware of by the transmissivity of linear filter, it is possible to
By transmissivity in linear filter spectral line and the relation of wavelength, wavelength is obtained.The wavelength measurement system of the utility model embodiment
System measures linear filter transmitted light using the photoelectric current of the first photodetector measurement reference light using the second photodetector
Photoelectric current.The photoelectric current of the photoelectric current of second photodetector measurement divided by the measurement of the first photodetector is transmitted
Rate, and then preliminary wavelength is obtained according to transmissivity spectral line.
Because the factors such as the manufacture craft of linear filter, nonlinear effect influence, there is certain miss in its wavelength measured
Difference, but testing laser wavelength can be determined, in a less scope, at this moment to utilize double Fabry-Bo Luo interferoetalons
Module accurately measures wavelength in this error range.
In the utility model embodiment, the wavelength of measurement laser that can be substantially using linear filter.Linearly filtering
In the frequency error range of ripple device, two Fabry-Bo Luo interferoetalons in double Fabry-Bo Luo interferoetalons modules
The high-precision measurement optical maser wavelength in continuous frequency domain can be realized.
In the utility model embodiment, the spectral module 11, double Fabry-Bo Luo interferoetalons modules
12nd, the linear filter 13, first photodetector 14 and second photodetector 15 are all optical fibre device；
The spectral module 11 is connected with the linear filter 13 by the joints of optical fibre；
The linear filter 13 is connected with second photodetector 15 by the joints of optical fibre；
The spectral module 11 is connected with first photodetector 14 by the joints of optical fibre；
The spectral module 11 is connected with double Fabry-Bo Luo interferoetalons modules 12 by the joints of optical fibre.
In the utility model embodiment, double Fabry-Bo Luo interferoetalons modules 12 can include：First spectroscope
121st, the second spectroscope 122, the first Fabry-Bo Luo interferoetalons 123, the second Fabry-Bo Luo interferoetalons 124,
3rd photodetector 125, the 4th photodetector 126, the 5th photodetector 127, the 6th photodetector 128；
The laser of double Fabry-Bo Luo interferoetalons modules 12 is incided after first spectroscope 121,
A part of laser is reflected into the first Fabry-Bo Luo interferoetalons 123 by the first spectroscope 121, and another part is saturating
Cross first spectroscope 121 and enter second spectroscope 122；
The laser for inciding the first Fabry-Bo Luo interferoetalons 123 is output to the 3rd photodetector
125；
Incide the laser of second spectroscope 122, a part is reflected into described the by second spectroscope 122
Two Fabry-Bo Luo interferoetalons 124, another part are output to the 4th photoelectricity through second spectroscope 122 and visited
Survey device 126；
The laser of the second Fabry-Bo Luo interferoetalons 124 is incided, a part passes through the second method cloth
In-Bo Luo interferoetalons 124 enter the 5th photodetector 127；Another part is by second Fabry-glass Luo Gan
Relate to etalon 124 to reflect, be again introduced into second spectroscope 122；
It is reflected into the laser of second spectroscope 122 by the second Fabry-Bo Luo interferoetalons 124, one
Part enters the 6th photodetector 128 through second reflective mirror 122；
The photoelectric current of 3rd photodetector 125 measurement and the photoelectric current of the 4th photodetector 126 measurement
For calculating transmissivity of the laser by the first Fabry-Bo Luo interferoetalons 123, to determine that multiple first is accurate
Wavelength；
The photoelectric current of 5th photodetector 127 measurement and the photoelectric current of the 6th photodetector 128 measurement
For calculating transmissivity of the laser by the second Fabry-Bo Luo interferoetalons 124, to determine that multiple second is accurate
Wavelength；
The multiple first accurate wavelength, the multiple second accurate wavelength, it is used for the preliminary wavelength described in determination
The wavelength of testing laser.
Reference picture 3 is the schematic diagram of the transmissivity spectral line of Fabry-Bo Luo interferoetalons.By Fabry-glass Luo Gan
The transmissivity of the laser of etalon is related to, is in cyclically-varying with the frequency of laser, and frequency cycle is smaller, therefore can be used for
Accurately measurement laser frequency.
Because the transmissivity spectral line of Fabry-Bo Luo interferoetalons is periodic, therefore a transmissivity is corresponding more
Individual frequency, that is, a transmissivity correspond to multiple wavelength.Usual Fabry-Bo Luo interferoetalons are made as accurately measuring
Frequency in a certain frequency band, measurement range is between one or several frequency cycles.That is a Fabry-glass is passed through
Measurement wavelength corresponding to the transmissivity of the laser of sieve interferoetalons is in a fixed frequency section.
Again because linear filter can uniquely determine preliminary wavelength, thus can will in the multiple first accurate wavelength with tentatively
The immediate wavelength of wavelength, or using in the multiple second accurate wavelength with the immediate wavelength of preliminary wavelength as testing laser
Wavelength.
In the utility model embodiment, the linear filter of different-waveband is used, you can flexible wavelength switching measurement system
The service band of system.
In the utility model embodiment, double Fabry-Bo Luo interferoetalons modules 12 also include fiber optic collimator
Device (not shown), the optical fiber collimator are used to the incident light of joints of optical fibre output being converted to collimated light.It is divided mould
Block 11 is connected by the joints of optical fibre with the optical fiber collimator of double Fabry-Bo Luo interferoetalons modules 12, optical fiber output
Light is converted to collimated light after optical fiber collimator, is then incident on the first spectroscope 121.
In the utility model embodiment, the first Fabry-Bo Luo interferoetalons 123 and the second method cloth
In-Bo Luo interferoetalons 124 transmissivity spectral line frequency cycle it is identical, and first Fabry-glass Luo Gan relates to mark
The frequency cycle of the transmissivity spectral line of quasi- tool 123 and the second Fabry-Bo Luo interferoetalons 124, it is linear less than described
The frequency error range of wave filter 13.The error range of linear filter, between 100GHz, is used herein typically in tens of GHz
Frequency represents wavelength unit.
In the utility model embodiment, double Fabry-Bo Luo interferoetalons modules 12 can also include：With described
First Peltier (not shown) of one Fabry-Bo Luo interferoetalons 123 connection, with the second Fabry-Bo Luo
The second Peltier (not shown) that interferoetalons 124 connect, standard is related to for measuring first Fabry-glass Luo Gan
First temperature sensor (not shown) of the temperature of tool 123, and relate to mark for measuring second Fabry-glass Luo Gan
The second temperature sensor (not shown) of the temperature of quasi- tool 124.
Fabry-Bo Luo interferoetalons are temperature sensitivity optical devices, when etalon module works, it is necessary to respectively to two
Individual etalon carries out temperature control, allows them to be worked in the working temperature environment of setting.
In the utility model embodiment, according to first temperature sensor measurement the first Fabry-Bo Luo interferoetalons
123 temperature, the operating temperature of the first Fabry-Bo Luo interferoetalons 123 is controlled to keep constant by the first Peltier.
The temperature of the first Fabry-Bo Luo interferoetalons 124 is measured according to second temperature sensor, by the second Peltier
The operating temperature of the second Fabry-Bo Luo interferoetalons 124 is controlled to keep constant.
Reference picture 4 is the signal that double Fabry-Bo Luo interferoetalons modules measure wavelength in the utility model embodiment
Figure.In the utility model embodiment, the first Fabry-Bo Luo interferoetalons 123 and the second Fabry-Bo Luo
The position of the maximum of points of transmissivity spectral line between interferoetalons 124 is staggered a quarter frequency cycle.Fabry-
In the transmissivity spectral line of glass sieve interferoetalons, the slope of the spectral line near peak value and valley is relatively low, thus resolution ratio is relatively low.
The slope of spectral line between peak value and peak valley is higher, and resolution ratio is higher.By the He of the first Fabry-Bo Luo interferoetalons 123
Stagger a quarter frequently in the position of the maximum of points of transmissivity spectral line between second Fabry-Bo Luo interferoetalons 124
The benefit in rate cycle is that in the transmissivity spectral line of two Fabry-Bo Luo interferoetalons, the transmissivity of testing laser is located at
The larger region of slope at least one transmissivity spectral line, that is, realize and wavelength is accurately measured in continuous frequency domain.
As set forth above, it is possible to using in the multiple first accurate wavelength with the immediate wavelength of preliminary wavelength as testing laser
Wavelength, or using the wavelength in the multiple second accurate wavelength with the immediate wavelength of preliminary wavelength as testing laser.
Selection be using the wavelength in the multiple first accurate wavelength with the immediate wavelength of preliminary wavelength as testing laser,
Or using in the multiple second accurate wavelength with the immediate wavelength of preliminary wavelength as during the wavelength of testing laser, can be according to ripple
Selected corresponding to long in the slope of the position of transmissivity spectral line.By corresponding to wavelength the position of transmissivity spectral line slope compared with
Big wavelength, the wavelength as testing laser.
For example, corresponding with the immediate wavelength of preliminary wavelength in multiple first accurate wavelength be in the position of transmissivity spectral line
Crest, in multiple second accurate wavelength it is corresponding with the immediate wavelength of preliminary wavelength in the position of transmissivity spectral line be in crest and
Position between trough.Because the slope of the position between crest and trough is larger, therefore select in multiple second accurate wavelength
With wavelength of the immediate wavelength of preliminary wavelength as testing laser.
During the wave length measuring system measurement wavelength of the utility model embodiment, six photodetectors in measuring system are only needed
Photoelectricity stream information can measure wavelength, measure it is wavelength converting for measurement photoelectric current, the measurement of microsecond rank high speed can be realized
Wavelength.
In double Fabry-Bo Luo interferoetalons modules, the transmissivity spectrum between two Fabry-Bo Luo interferoetalons
Stagger a quarter frequency cycle the position of the maximum of points of line, it is possible to achieve the accurate measurement wavelength in continuous frequency domain.
The structure of whole wave length measuring system is simple, greatly reduces the cost of wavelength measurement.
Finally, it is to be noted that, herein, such as first and second or the like relational terms be used merely to by
One entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operation
Between any this actual relation or order be present.Moreover, term " comprising ", "comprising" or its any other variant meaning
Covering including for nonexcludability, so that process, method, article or terminal device including a series of elements are not only wrapped
Those key elements, but also the other element including being not expressly set out are included, or is also included for this process, method, article
Or the key element that terminal device is intrinsic.In the absence of more restrictions, wanted by what sentence "including a ..." limited
Element, it is not excluded that other identical element in the process including the key element, method, article or terminal device also be present.
Above to a kind of wave length measuring system provided by the utility model, it is described in detail, it is used herein
Specific case is set forth to principle of the present utility model and embodiment, and the explanation of above example is only intended to help and managed
Solve method and its core concept of the present utility model；Meanwhile for those of ordinary skill in the art, according to of the present utility model
Thought, there will be changes in specific embodiments and applications, in summary, this specification content should not be construed as
To limitation of the present utility model.
Claims (8)
- A kind of 1. wave length measuring system, it is characterised in that including：Spectral module, double Fabry-Bo Luo interferoetalons module, linear filter, the first photodetector and the second light Electric explorer；The spectral module is used to the testing laser of input being divided into multichannel, and is separately input to the linear filter, described First photodetector and double Fabry-Bo Luo interferoetalons modules；The laser for inciding the linear filter is output to second photodetector；The photoelectric current of the first photodetector measurement and the photoelectric current of second photodetector measurement are sharp for calculating Light is by the transmissivity of linear filter, to measure preliminary wavelength；Double Fabry-Bo Luo interferoetalons modules are used to measure multiple accurate wavelength, the multiple accurate wavelength and institute State the wavelength that preliminary wavelength is used to determine the testing laser.
- 2. system according to claim 1, it is characterised in that double Fabry-Bo Luo interferoetalons modules include： First spectroscope, the second spectroscope, the first Fabry-Bo Luo interferoetalons, the second Fabry-Bo Luo interferoetalons, Three photodetectors, the 4th photodetector, the 5th photodetector, the 6th photodetector；The laser of double Fabry-Bo Luo interferoetalons modules is incided after first spectroscope, a part swashs Light is reflected into the first Fabry-Bo Luo interferoetalons, and another part is through described in first spectroscope entrance Second spectroscope；The laser for inciding the first Fabry-Bo Luo interferoetalons is output to the 3rd photodetector；Described second spectroscopical laser is incided, a part is reflected into the second Fabry-Bo Luo interferoetalons, Another part is output to the 4th photodetector through second spectroscope；The laser of the second Fabry-Bo Luo interferoetalons is incided, a part passes through second Fabry-glass Luo Gan Relate to etalon and enter the 5th photodetector；Another part is reflected by the second Fabry-Bo Luo interferoetalons, then It is secondary to enter second spectroscope；Described second spectroscopical laser is reflected into by the second Fabry-Bo Luo interferoetalons, a part passes through institute State the second spectroscope and enter the 6th photodetector；The photoelectric current of the 3rd photodetector measurement and the photoelectric current of the 4th photodetector measurement are sharp for calculating Light is by the transmissivities of the first Fabry-Bo Luo interferoetalons, to determine the multiple first accurate wavelength；The photoelectric current of the 5th photodetector measurement and the photoelectric current of the 6th photodetector measurement are sharp for calculating Light is by the transmissivities of the second Fabry-Bo Luo interferoetalons, to determine the multiple second accurate wavelength；The multiple first accurate wavelength, the multiple second accurate wavelength, it is described to be measured for determining with the preliminary wavelength The wavelength of laser.
- 3. system according to claim 1, it is characterised in thatThe spectral module includes：1X4 optical splitters, photo-coupler, the light-splitting device of plane light wave conduction.
- 4. system according to claim 2, it is characterised in that the first Fabry-Bo Luo interferoetalons and described The frequency cycle of the transmissivity spectral line of second Fabry-Bo Luo interferoetalons is identical.
- 5. system according to claim 4, it is characterised in that the first Fabry-Bo Luo interferoetalons and described The frequency cycle of the transmissivity spectral line of second Fabry-Bo Luo interferoetalons, less than the frequency error of the linear filter Scope.
- 6. system according to claim 4, it is characterised in that the first Fabry-Bo Luo interferoetalons and described Stagger a quarter frequency week the position of the maximum of points of transmissivity spectral line between second Fabry-Bo Luo interferoetalons Phase.
- 7. system according to claim 1, it is characterised in thatThe spectral module, double Fabry-Bo Luo interferoetalons modules, the linear filter, first photoelectricity Detector and second photodetector are optical fibre device；The spectral module is connected with the linear filter by the joints of optical fibre；The linear filter is connected with second photodetector by the joints of optical fibre；The spectral module is connected with first photodetector by the joints of optical fibre；The spectral module is connected with double Fabry-Bo Luo interferoetalons modules by the joints of optical fibre.
- 8. system according to claim 7, it is characterised in that double Fabry-Bo Luo interferoetalons modules are also wrapped Optical fiber collimator is included, the optical fiber collimator is used to the incident light of joints of optical fibre output being converted to collimated light.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063478A (en) * | 2017-04-17 | 2017-08-18 | 深圳大学 | A kind of wave length measuring system and measuring method |
| CN113686453A (en) * | 2021-09-08 | 2021-11-23 | 中国矿业大学(北京) | Radio wave wavelength measuring device and radio wave wavelength measuring method |
-
2017
- 2017-04-17 CN CN201720398037.3U patent/CN207007348U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063478A (en) * | 2017-04-17 | 2017-08-18 | 深圳大学 | A kind of wave length measuring system and measuring method |
| CN113686453A (en) * | 2021-09-08 | 2021-11-23 | 中国矿业大学(北京) | Radio wave wavelength measuring device and radio wave wavelength measuring method |
| CN113686453B (en) * | 2021-09-08 | 2022-09-16 | 中国矿业大学(北京) | Radio wave wavelength measuring device and radio wave wavelength measuring method |
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